Fluid meter



Sem. s, 1927. R c ENYART 1,541,340

FLUIDMETER Filed March 25, 1922 4 sheets-sheet 1 Sept. 6, 1927.

R. C. ENYART FLUID METER Filed March 25, 1922 4 Sheets-Sheet 2 @MMSS Sept. m92?. R c ENYMT 1,641,840

FLUID METER Filed March 25. 1922 i 4 Sheets-Sheet 3 Sept 6 1927' R. c. ENYART FLUID METER Filed March 25, 1922 4 Sheets-Sheet 4 Patented tient., d, i924?.

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PH U. ENTMLET, 0F GONNERSVILLE, INDIANA, ASSIGNOR TO THE P. H. 6i: 1". M. RTS CBITPANY, 01E' CDNNEBSVLLE, INDIANA., A CORPORATION 0F INDIANA.

FLUID ltlETER.

Application tiled March 25, 1923. Serial No. 546,656.

T he present invention relates to meters .tor use in measuring the volume of tluid flowing through a conduit. The invention .provides a meter adaptable to all conditions in which this purpose is to be accomplished, but the meter illustrated in detail in the drawings is especially designed and adapted to be used as a station .meter at gas works to measure tlieyolume ot' gas delivered. The meter provided by this invention is thoi oughly accurate and is Afurther especially characterized by a very notable simplicity in construction, and by economy of installa-- tion and operation.

In the drawiogs,-

Figure l is a side elevation of a meter em bodying the invention. l

Figure 2 is an end 'elevation thereo't.

Figure 3 is a section on the line tl-3 in Figure l.

Figure L is a section on the Figure 2, and

Figure 5 is a section on the Figure if).

The meter comprises a casing; l pre-i -rably made ot cast iron and mounted on a hase 2. The casing is provided atI opposite sides with openings 23, one of which constitutes an inlet and the other zujt outlet for the llovv of fluid through the meter. Pipe lines Lt coiimiuni cate with the openings in the casing. in order to avoid any poesible distortion oi' the casing' in connecting the .pipes l with it, the pipes are preferably flexibly connected with the casing as illustrated 1n Figure Vin thisl construction extensions 5 are secured to the casing surrounding the openings 3 and apertured flexible diaphragins 6 are scoured against the outer faces of the extensions. The pipes 4l are secured to the flexible diaphragms by annular plates 7. The pipe communicating; with the bottom of the casing may extend down through the base 2 and the door or may be extended along the tloor, in which event the hase 2 will be elevated on a suitable pedestal.

A pair ot' parallel shafts 8 are journaled in the head plates 9 of the casing l and in order that the Shafts may be rotated by the least possible power they are jouinaled in antifriction bearings l0, illustrated in the drawline fl---l in line SM5 in ings as the Well known 'limken roller bearing. An impeller l1 extending the length of the casing 1 is keyed on each of the shafts 8 and in order that the im ellers may be rotated as easil as possible tliey are preferably madeot' a uminuin alloy. In the drawings the casing is shown with inlet and out let, openings at the bottom and top respectively and the impellers are shown secured to parallel shafts separated horizontally from each other. If desired the casing may be mounted so that the inlet and outlet openings' are at the sides and the impeller shafts are separated vertically.

The coutiguration of the impellers and ot the interior surface of the casing and the principle of operation by which a definite or tixed quantity or volume of air passes through the casing at each revolution of the inipellers are analogous to the construction and principle of operation ol-- the well known Roots blowers and exhaustcrs. The impeller shafts are connected by timingr gears so that the iinpellers rotate in accurate relation to each other. The interior surface of euch hall' ol the casing?r is formed on a semi-circle having; the axis oi the adjacent impeller shaft as its center. 'lhe width of the impeller is such that at all times one or the other of its endsis approximately in Contact with the casing'. The exterior surfaces: of the impellrrs are :toi-ined on arcs of circles so that durinfhr revolution of the iiupellcrs they are :it all times approximrcly in contact with each other.

Referring to Figure 3, assume that gas or other fluid is ei'itering gI the casing ab the bottom and discharging at the top.y and that the impellers :ire revolving `in thel direction of the arrows. The gas cannot pass between the two impellers. Gas enters to the right of the right. iinpcller and as the latter continues to rotate a volume of gas is trapped between the impeller and the casing at the inst-ant the iinpeller is in vertical positionsM AS the iiiipeller continues to rotate communication is established with the opening in the top of the casing and the previously trapped gas is permitted to escape. The volume of the space between the impeller and the casing when the mpeller is in vertical positien, is accurately predetermined, and this volume of is permitted to pces through the casino' twice 'lor euch revolution of one iinpelier or 'four tinies for euch revolution ol both et the impellers. Consequently, uneccurzitely meusured quuntity ot' or other uid positively is delivered through the cusing :1t each revolution ot the iinpellers.,

ln the construction illustrated the imn peliers will be roi uted by the lorce oit thegas or other duid lion/ing through. the casing. lin order tooverconie the inertie. ot the irnpellers et the outset, they may, if desired, be rotated initially by hund crank. For this purpose e supplementary shaft l2 is uzrial'ly aligned with one of the impeller vsliutts 8 vand is slideble toward the latter in u housing llegsinst the compression spring 1d. The inner end oli the shaft l2 is hollow and Slides over the end ot' the shaft 8 so that notches 3ft -l'orined inthe shaft l2 may en gage pins l5 on the shalt 8. The shutts l2 and 8 muy then be initially rotated by e, crank engaging the projections i6 on the' sheiit l2., Leske/ge ut the end et the impeller shalt is prevented by pecking.; li secured sround the shalt l2 by the gland 18. l

@ne ot the iiupcller slnilts c hns secured` ut its outer end u, geur l) meshing with u geur secured to u, wub shalt journalcd in e housing 2l. A geur secured on the stub shalt meshes with u geur "Il secured to u shell; 2i. Leultuge ut the end et this inul peller sli-litt -is prevented by bucking 2:3 secured around the shalt 24s by u gland 26 The shult operutes u counter 27 in .manner similar to the operation of un ordinary revolution counter, which is convcniently mounted on pluto :it one end of the cus# ing. Since et euch revolution ot the innn peller shaft e delinitely known volume of gus or other iuid purses Vthrough the casing, the gears l), 20, 22 und 23 muy be made with such rutios that the counter 27 will. directly register hundreds olf cubic lect elV ,gas 'which have passed through the nieter. ln some instuiuzes gus will be delivered throu h the meter in one direction during part o1u t ie day und returned in the opposite direction :it another time during-the duy. During the lutter period the direction of rotation of the impellers und oit the operating nicchanisin in the counter 27, will be reversed so that finally the counter will indicate the .net volume ot gas delivered.

ln order to prevent friction between the impellers ll end the casing l n slight clearence must be provided between the surftuces of the impellers und the casing. .A snuill amount voi ges will pass through this clear ance space without being registered'hy the revolution oit the iinpellers. rl`he volume of gas which will .slip past the inipellers, however, veri-es solely with the specific gravity'.I tu? me or other fluid being metered und,

with the difference in pressure between the inlet une outlet sides ot the iinpellers representing the torce required to rotate the impellers. ln order to determine and record this ditierence in pressures a recording dit erentiul pressure gauge 28 ol usual type is connected by pipes 29 und 30 With the inlet and outlet sides ont the casing. The chart niade by the recording gouge, of course, will disclose the sverage-dili`erential pres sure over any `desired length of time. A chart 3l convcnientlysecured to the casing is designed A,so as to indicate at e glance the volume of gas which will slip past the infrY pellers in u given length of time under various dill'erentisl pressures. Consequently, the slippage of gas or other duid 'Will be readily determined and added to the volume indicated by the counter 27, the specific gruvity ot the gus being deelt with in s given installation, ot course, being known. and teken into consideration.

'l'he volume of gas passing` through the meter under varying temperature conditions niust for commercial purposes be reduced to volume ut u constant temperature. For this purooge :i therxhonieter 32 is subjected to the gus or other liuid passing through the meter und is connected with e recordin instrument 53, by ineens o' which the vo unie of fluid passing through the ine-ter may be computed into volume ut o constant temperature. 4

lluving thus'described my invention, what l cleiui es new and desire to secure by Letters lljutent of the United States is l.. it duid meter ot the character dem scribed, comprising e casing having en 'in-v let opening lund un outlet opening therein, rotatable iinpellers within said casing between the inlet end outlet-openings and adapted to be lictuuted by fluid passing through the said casing, seid mpellers heving un operating clearance Withrespect to the said cesing, counter mechanism operiibly connected to the seid imnellers und constructed to indicate u given quantity of ou" rough the seid nieter for each revolution cit the said impellers, and mechanism for indicating the quantity et duid passing through seid operating clearance, vvhcreby the actual quantity of fluid passing through the said meter muy be determined. v l

2. it. fluid meter of the character described, coniprising e casing luivingsnv inlet opening and en outlet opening, cooper able rotatable iinpellers within said easing adapted to be actuated by the fluid passing therethrough, said impellers hzivingex substantially constant operating clearance with respect to seid casing', u counter mechanism operatively connected to seid impellers'end constructed to indicate u, given quantity of 'Elow through the seid meter for each revolution et the seid inipcllers, and mechanism www@ comprising .1 revonxlmg (.mfentn. pmsmr-v giunge, ummm-Huma from Suid gauge tu thu Imlvt und U1 mitici Sum ubpctivly uit' :mid casing, und :1 mlln'mlon cmurt, mandated wh Suid dfewntiu prfafasurc gauge, said nmclmnsm indicating the quantity Gf Huid. pmasing 'through Sad @panting clm'fmm,

thereby mm'liitng dutermilmtion of Hw totaal quantity 01' Huid pasing through zml matar. 10

.in witness: Whereu", l he'mmn suwmbe my mmm thisxl 22nd dug.' of March, U' 

